Hand-cranked pencil sharpeners

Abstract

Disclosed is a hand-crank pencil sharpener, comprising a housing and a gearing member and a sharpening member which are installed within the housing. The gearing member is connected to a hand crank and transmits a rotation of the crank to the sharpening member. A vertical feeding path is provided for a pencil to be inserted into the sharpening member. The hand-crank pencil sharpener further comprises a feeding member in the feeding path. The gearing member comprises a gearing branch for driving the feeding member. The inserted pencil is fed into or withdrawn from the sharpener automatically by a linkage of the gearing branch and the feeding member when the crank is rotated clockwise or counterclockwise.

The invention claimed is: 
     
       1. A hand-crank pencil sharpener, comprising a housing, a gearing member and a sharpening member, the gearing member and the sharpening member being installed within the housing, and the gearing member being connected to a hand crank and transmitting a rotation of the crank to the sharpening member,
 wherein the sharpener further comprises a feeding member arranged in the feeding path, and 
 wherein the gearing member comprises a gearing branch for driving the feeding member, and the inserted pencil is fed into or withdrawn from the sharpener automatically by a linkage of the gearing branch and the feeding member when the crank is rotated clockwise or counterclockwise, 
 wherein the feeding member comprises a feeding gear set driven by the gearing branch and a pair of feeding rubber tyres driven by the feeding gear set, the pair of feeding rubber tyres are mounted on two actuation shafts, respectively, the actuation shafts are connected by at least one resilient member for adjusting an interval between the feeding rubber tyres so that pencils having diameters different from one another are able to be inserted and pre-tightened. 
 
     
     
       2. The hand-crank pencil sharpener of  claim 1 , wherein the resilient member connects ends of the actuation shafts, and a feeding opening is provided in the feeding member aligned with a midline of the pair of feeding rubber tyres. 
     
     
       3. The hand-crank pencil sharpener of  claim 2 , wherein each of the actuation shafts is supported by arc guides in a pair of vertical fixed walls, and the feeding member further comprises a slider for keeping the actuation shafts in a same horizontal position when they move upwards or downwards to adapt for pencils having diameters different from one another. 
     
     
       4. The hand-crank pencil sharpener of  claim 3 , wherein the housing comprises a bottom plate, a support extending upward from the bottom plate, and a division plate parallel with the bottom plate,
 wherein the feeding member is positioned above the division plate, the sharpening member is positioned under the division plate, the waste box is connected with the support via a buckle, and a button for removing the waste box is provided on the support. 
 
     
     
       5. The hand-crank pencil sharpener of  claim 4 , wherein a tenon is provided on the bottom plate for positioning the waste box initially. 
     
     
       6. The hand-crank pencil sharpener of  claim 5 , wherein a rotating cover is mounted in an upper cover of the housing, and a plurality of openings having diameters different from one another are provided in the rotating cover for receiving pencils of various sizes. 
     
     
       7. The hand-crank pencil sharpener of  claim 2 , wherein the housing comprises a bottom plate, a support extending upward from the bottom plate, and a division plate parallel with the bottom plate,
 wherein the feeding member is positioned above the division plate, the sharpening member is positioned under the division plate, the waste box is connected with the support via a buckle, and a button for removing the waste box is provided on the support. 
 
     
     
       8. The hand-crank pencil sharpener of  claim 1 , further comprising a removable waste box under the sharpening member. 
     
     
       9. The hand-crank pencil sharpener of  claim 8 , wherein the housing comprises a bottom plate, a support extending upward from the bottom plate, and a division plate parallel with the bottom plate,
 wherein the feeding member is positioned above the division plate, the sharpening member is positioned under the division plate, the waste box is connected with the support via a buckle, and a button for removing the waste box is provided on the support. 
 
     
     
       10. The hand-crank pencil sharpener of  claim 1 , wherein a fixing member is combined with a bottom of the hand-crank pencil sharpener,
 wherein the fixing member comprises an adjusting rod, a fixing plate mounted on the adjusting rod via a sleeve, and a knob for adjusting a distance between the bottom of the pencil sharpener and the fixing plate. 
 
     
     
       11. The hand-crank pencil sharpener of  claim 10 , wherein the housing comprises a bottom plate, a support extending upward from the bottom plate, and a division plate parallel with the bottom plate,
 wherein the feeding member is positioned above the division plate, the sharpening member is positioned under the division plate, the waste box is connected with the support via a buckle, and a button for removing the waste box is provided on the support. 
 
     
     
       12. The hand-crank pencil sharpener of  claim 1 , wherein the housing comprises a bottom plate, a support extending upward from the bottom plate, and a division plate parallel with the bottom plate,
 wherein the feeding member is positioned above the division plate, the sharpening member is positioned under the division plate, the waste box is connected with the support via a buckle, and a button for removing the waste box is provided on the support. 
 
     
     
       13. The hand-crank pencil sharpener of  claim 12 , wherein a tenon is provided on the bottom plate for positioning the waste box initially. 
     
     
       14. The hand-crank pencil sharpener of  claim 13 , wherein a rotating cover is mounted in an upper cover of the housing, and a plurality of openings having diameters different from one another are provided in the rotating cover for receiving pencils of various sizes. 
     
     
       15. The hand-crank pencil sharpener of  claim 1 , wherein the feeding gear set comprises a duplex feeding gear and a second feeding gear, the second feeding gear being fixed on an end of one of the actuation shafts for the feeding member, and the duplex feeding gear being engaged with the second feeding gear and driven by the gearing branch. 
     
     
       16. The hand-crank pencil sharpener of  claim 1 , wherein the housing comprises a bottom plate, a support extending upward from the bottom plate, and a division plate parallel with the bottom plate,
 wherein the feeding member is positioned above the division plate, the sharpening member is positioned under the division plate, the waste box is connected with the support via a buckle, and a button for removing the waste box is provided on the support. 
 
     
     
       17. The hand-crank pencil sharpener of  claim 16 , wherein a tenon is provided on the bottom plate for positioning the waste box initially. 
     
     
       18. The hand-crank pencil sharpener of  claim 17 , wherein a rotating cover is mounted in an upper cover of the housing, and a plurality of openings having diameters different from one another are provided in the rotating cover for receiving pencils of various sizes.